Stock-specific harvest decision rules for the John dory (JDO 7), red gurnard (GUR 7), and snapper (SNA 7) fisheries within the Challenger Fisheries Management Area

Trophia has been funded by MFish to Develop stock-specific harvest decision rules for the John dory (JDO 7), red gurnard (GUR 7), and snapper (SNA 7) fisheries. SPECIFIC OBJECTIVES: Develop a harvest decision rule for the JDO 7 fishery using fisheries dependent and independent information to manage biomass at the long-term average and take advantage of periods of higher than average biomass. Develop stock specific harvest decision rules for the GUR 7 and… Read More

Characterisation of New Zealand fisheries for skipjack tuna

Trophia has been contracted by the New Zealand Ministry of Fisheries : To characterise the fisheries for skipjack tuna in the New Zealand fisheries waters, for New Zealand vessels fishing in other EEZ’s and on the high seas. Skipjack was the first commercially exploited tuna in New Zealand waters, with landings beginning in the 1960s in the Taranaki Bight and quickly extending to the Bay of Plenty. The fishery in New Zealand… Read More

Stock assessment of TRE 7

Trophia has been contracted by the New Zealand Ministry of Fisheries (MFish) to conduct a stock assessment for trevally (Pseudocaranx dentex) in TRE 7, including estimating biomass and sustainable yields. The specific objectives for this project include: 1. To update the descriptive analysis of the TRE 7 fishery up to the end of the 2007/08 fishing year. 2. To review and summarise the historical biological and other relevant data (including length frequency,… Read More

The status of the major blue moki fishstocks.

Trophia was contracted by the New Zealand Ministry of Fisheries (MFish) to characterise the MOK 1 fishery by analysis of existing commercial catch and effort data and data from other sources; and make recommendations on appropriate methods to monitor or assess the status of this Fishstock. This project was funded by MFish project MOK2002-01 Outputs include presentation of results to a Ministry of Fisheries Inshore Working Group meeting in March 2004. A… Read More

Fine scale reporting of catch effort information

Trophia was contracted by the New Zealand Ministry of Fisheries MFish, to consult and report on options for improving the spatial resolution in catch and effort data from New Zeland fisheries. The demand for more spatial resolution in fisheries catch-effort data comes from managers, scientists and compliance officers and is driven largely by the movement towards managing fisheries at a finer spatial scale. Several options exist for improving the spatial resolution of… Read More

Stock assessment of trevally in TRE 7

Trophia was contracted by the New Zealand Ministry of Fisheries (MFish) to carry out a stock assessment for trevally ( Pseudocaranx dentex ) in TRE 7, including estimating biomass and sustainable yield.The specific objectives for this project were: 1. To update the standardised and unstandardised CPUE analyses for TRE 7. 2. To update the current TRE 7 stock assessment including estimating biomass and sustainable yield. This project was funded by the New… Read More

Stock assessment of barracouta

Trophia was contracted by the New Zealand Ministry of Fisheries (MFish) to carry out stock assessments of barracouta, including estimating biomass and sustainable yields. The specific objectives for this project include: 1. To determine the relationship between barracouta on the East Coast and West Coasts of the South Island and with the stock in BAR 5. 2. To carry out stock assessment of barracouta (BAR 5) including estimating biomass and sustainable yields…. Read More

Characterisation of the Alfonsino fishery in BYX 3

Trophia was contracted by the New Zealand Ministry of Fisheries (MFish) to characterise the alfonsino (Beryx splendens ) fishery by analysis of existing commercial catch and effort data and data from other sources; and make recommendations on appropriate methods to monitor or assess the status of this fishstock. The specific objectives for this project include: 1. To characterise the BYX fishery by analysis of existing commercial catch and effort data and data… Read More